https://w3id.org/framester/conceptnet5/data/en/lewis_acid <https://w3id.org/framester/conceptnet5/schema/DerivedFrom> <https://w3id.org/framester/conceptnet5/data/en/acid> <https://w3id.org/framester/conceptnet5/data/en/lewis.n> <https://w3id.org/framester/conceptnet5/schema/IsA> <https://w3id.org/framester/conceptnet5/data/en/chemistry> risorse dalla linked data cloud